I am new to this and was not comfortable editing a page. I believe that the paragraph about string variables has a typo in that it states that there are ten built-in matrix variables. I think that was probably a cut and paste typo from the previous paragraph about matrices.

Also, you should really not bother feeling shy about editing a page — everyone's new at some point :D Besides, even if you decided to replace the page content with an assortment of advertisement links, nothing is lost permanently.

Wikipedia has the excellent "Be bold" catchphrase — maybe we should adopt it.